i scanned it today and it came up with a code 27 which is egr vacuum control solenoid circuit. the scanner says EGR electrical fault. now i did away with the egr on my car by blocking it at the manifolds, im guessing this is what caused the problem. I did try to fix the exhaust leak by tightening the loose exhaust manifold bolts and it seemed to help for a bit. i guess ill do that again just to see if it helps anything. thats the easiest thing for me to do at the moment anyway. im just wondering what this fault means exactly? and im glad to have guys like you all on here to help, its much appreciated.
95 z28 a4, 3500lbs race weight, Moroso CAI, 1LE elbow, free mods, 1.6 nsa RR, 7/16 studs, guideplates, hardened pushrods, cutout after the cat. Current 1/4 mile:13.47 @ 102.56 mph Corrected time: 13.39 @ 103.65 mph Goal:12.5 with bolt-ons.